DS-41EB-3 Oct ’06

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Page 3

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GPS Receiver Module

GPS-41EBR

GPS-41EBF

Pin-1

Pin-10

UT-41EBF Lateral View

PINOUT DESCRIPTION

Pin Number

Signal Name

Description

1

Serial Data Out 1 Asynchronous serial output at LVTTL level, to output NMEA message

2

Serial Data In 1

Asynchronous serial input at LVTTL level, to input commands

Pull high if not used

3

VCC

Regulated 3.3V power input (3.3V version)

3.8V ~ 8.0V (5V version)

4

GND

Ground

5

PIO Output

PIO output, default used for GPS status indication

6

1PPS

1 pulse per second time mark

7

RESET IN

Reset input, active LOW

8

Serial Data In 2

Asynchronous serial input at LVTTL level, to input DGPS RTCM data

Pull high if not used

9

VBAT

Optional 3.3V backup power input to sustain RTC and SRAM data

10

Antenna Power

Power input for active antenna

1PPS Output

The GPS receiver is in navigation mode upon power-up, with 1PPS output free running. After 3 minutes of

valid position fix and remaining under static-mode, the receiver changes to timing-mode, with 1PPS output

signal synchronized to the UTC second. The receiver will change to navigation-mode, with 1PPS output free

running, if the receiver is in motion. The 1PPS output will become synchronized to the UTC second again after

the receiver had remained in static mode for 3 minutes.